CN205304491U - No bearing planet roll formula high -frequency vibration motor - Google Patents

Abstract

The utility model discloses a no bearing planet roll formula high -frequency vibration motor. The utility model discloses a no bearing of motor shaft diaxon end, around the end cover install a tapered raceway respectively, pivot diaxon end surface be with the similar taper shape of tapered raceway toper angle assorted, the pivot diaxon is held and is placed in the tapered raceway, rotor structure adopts mouse cage structure, the stator core shaft hole is great, and the rotor diameter is less, decides, the average clearance of the average air gap between the rotor between than tapered raceway and conical pivot axle head be big, stator winding adopts the duplex winding structure, and one of them cover is the starting winding, open on stator core's the outer periphery that to have a plurality of cross section be the vertical radiating groove of semicircular, big fin is installed at the rotor end ring position, it has the louvre to open on the end cover, installs vent and exhaust system intercommunication on the fan housing outside the end cover. The utility model discloses motor simple structure, with low costs, long service life, intensity of vibration, vibration frequency obtain improving.

Description

Bearing-free planetary roller type dither motor

Technical field

This utility model belongs to dither motor technical field, is specifically related to one and is powered by power frequency supply, and the planetary motion of rotating shaft improves the bearing-free planetary roller type dither motor of frequency of vibration.

Background technology

At present, in the construction process such as high ferro, subway and inter-city passenger rail, will extensively use dither motor to eliminate the tiny air gap formed in concrete formation process, improve the structural strength of bridge. Traditional dither motor produces exciting force mainly by the eccentric block at rotating shaft two ends, realizes increasing frequency speedup by changing supply frequency. And under normal circumstances, the price of the logical vibrating motor of a Daepori is also with regard to hundreds of unit, and the converter matched at least needs several thousand units even up to ten thousand, thus considerably increases equipment cost. In addition; harmonic effects due to variable-frequency power sources; and the rotating speed of high-frequency electric machines crosses high reason; can cause that the fault rate of conventional highfrequency motor is higher; the running frequency of usual this kind of motor is at more than 150Hz, and running speed, up to 9000 to 10000 turns per minute, can bear bigger radial direction exciting force at bearing portion simultaneously; the more high exciting force of rotating speed is more big, often causes the too high even bearing of bearing portion temperature rise quick-fried extremely. Therefore, current dither motor also exists the defect that equipment cost is higher, fault rate is higher, the life-span is not grown.

Summary of the invention

The purpose of this utility model is in that the drawbacks described above for conventional highfrequency vibrating motor, it is provided that one without transducer drive, can need not install bearing and magnetic levitation system can the steady in a long-term bearing-free planetary roller type dither motor run.

The purpose of this utility model realizes by the following technical solutions: this bearing-free planetary roller type dither motor, including support, stator, rotor, rotating shaft, front and rear cover; It is characterized in: described rotating shaft two axial ends bearing-free; The center of described front and rear cover is separately installed with the tapered raceway that inner surface is cone, rotating shaft two axial ends outer surface is the circle of similitude taper matched with tapered raceway angle of taper, rotating shaft two axial ends is placed in tapered raceway, and its mating surface all does high-frequency quenching and processes;Described rotor structure adopts mouse cage type structure; Described stator core is nonstandard structure, and stator core axis hole is relatively big, and rotor diameter is less, and the average airgap between stator and rotor is big compared with the mean gap between tapered raceway and cone rotating shaft axle head; Stator winding adopts double-winding structure, wherein a set of for starting winding; Having several cross sections on the outer circumference surface of described stator core is semicircular longitudinal radiating groove, and described rotor end ring position is provided with big fin; Having louvre on described end cap, the vent being installed on the fan housing outside end cap connects with exhaust system.

Concrete, described rotating shaft two axial ends outer surface and tapered raceway inner surface are its diameters to the cone tapered into outside two.

Concrete, after vibrating motor is energized, planet non-sliding rolling is done in described rotating shaft in tapered raceway, and rotating shaft often rolls along tapered raceway one week, just makes motor oscillating once, and motor planetary formula frequency of vibration meets formula calculated as below:

$f=\frac{kn}{60}=\left(\frac{r}{R-r}\right)\frac{n}{60}$

Wherein, f is the frequency of vibration during rolling of motor planetary formula, and n is the rotating speed of motor, and R is the tapered raceway two big radius of circle of outer tip end, and r is the rotating shaft two little radius of circle of outer tip end,Speed increasing ratio during for planet rolling.

This utility model adopts rotating shaft two axial ends directly to coordinate with tapered raceway, utilizes planet rolling principle, the high speed rotating between machine shaft two axial ends and tapered raceway beats generation dither. Without providing variable-frequency power sources can reach desirable dither, thus reducing cost, it also avoid the potential faults because high speed rotating causes. This utility model interiors of products simple in construction, bearing-free, without acceptance of persons, convenient disassembly. From experiment result of use, the ratio long service life of the conventional highfrequency vibrating motor of same power, oscillation intensity improves 30%, and frequency of vibration improves 20%.

This utility model has following superiority compared with conventional highfrequency vibrating motor:

(1) adopt bearing-free structure, greatly reduce the bearing fault hidden danger that dither motor causes because rotating speed is too high, structurally also relatively easy, manufacture and maintenance is all more convenient.

(2) vibrating effect is better than conventional highfrequency vibrating motor, exciting force and frequency of vibration are controlled by the taper fit at tapered raceway and rotating shaft two ends, than the long service life of the conventional highfrequency vibrating motor with power, oscillation intensity is high by 30%, and frequency of vibration wants high by 20%.

(3) electromagnetism has taken into full account in calculating that air gap is relatively big and heat dissipation problem, not only increase the stator coil number of turn on stator core, also increase radiating groove, also increase fin at rotor core end ring position, and outside end cap, installed exhaust system additional, to reduce vibrating motor temperature rise.

(4) adopting double-winding structure at stator winding sections, add a set of startup winding, start winding and only work in vibrating motor start-up course, after startup completes, winding disconnects automatically, and vibrating motor enters properly functioning mode of operation. This design improves the detent torque of vibrating motor, can realize the startup in short-term of dither motor.

(5) the conventional highfrequency too high problem of vibrating motor use cost is solved, it is no longer necessary to improve frequency of vibration by converter, but speed increasing ratio during by planet rolling improves frequency of vibration. The cost of converter is often several times even tens times of vibrating motor cost, and this utility model considerably reduces the use cost of conventional highfrequency vibrating motor.

Accompanying drawing explanation

Fig. 1 is the overall structure schematic diagram of this utility model embodiment.

Fig. 2 is the structural representation of Fig. 1 shaft.

Fig. 3 is the profile of tapered raceway in Fig. 1.

Fig. 4 is the planar structure schematic diagram of stator core stamping sheet in Fig. 1.

Fig. 5 is the structural representation of Fig. 1 rotor iron core.

Fig. 6 is that Fig. 1 continuous TURP of stator double winding changes control layout.

Fig. 7, Fig. 8 are that the work in tapered raceway of the roller end conical section runs schematic diagram.

Detailed description of the invention

Below in conjunction with drawings and Examples, this utility model is described in further detail.

Referring to Fig. 1, Fig. 2, Fig. 3, the dither motor of the present embodiment includes support 1, stator 2, rotor 3, rotating shaft 4, front and rear cover 5; Support 1 and front and rear cover 5 adopt the good 450-10 type ductile cast iron material of resistance to shock to make. It can be seen from figure 1 that the two axial ends bearing-free of rotating shaft 4; The center of front and rear cover 5 is respectively pressed into the tapered raceway 6 that inner surface is cone. The two axial ends outer surface of rotating shaft 4 is the circle of similitude taper that the angle of taper with tapered raceway 6 matches, and the two axial ends of rotating shaft 4 is placed in tapered raceway 6, and its mating surface all does high-frequency quenching and processes; The two axial ends outer surface of rotating shaft 4 and tapered raceway 6 inner surface are its diameters to the cone tapered into outside two. By normally assembling, rotating shaft 4 being pressed into rotor 3 axis hole, complete assembling, rotating shaft 4 two ends directly contact with tapered raceway 6, and rotating shaft 4 two ends and tapered raceway 6 are similar pyramidal structure, and dimensional fits is accurate, and contact site is through quenching technical, and hardness is higher, and wearability is good. When motor winding is energized, rotating shaft 4 rotates, rotating shaft 4 two ends are done non-sliding rolling in tapered raceway 6 and are run, by rotating shaft axle head, the planet rolling of tapered raceway is produced dither, coordinate, by what regulate axle head taper dimensions and tapered raceway size, exciting force and frequency of vibration that dither can be regulated. Rotor 4 structure adopts mouse cage type structure; Stator core is nonstandard structure, and stator core axis hole is relatively big, and rotor diameter is less, and the average airgap between stator and rotor is big compared with the mean gap between tapered raceway and cone rotating shaft axle head. Referring also to Fig. 6, stator winding 201 adopts double-winding structure, wherein a set of for starting winding; K in Fig. 6₂For delay switch, the operation as long as vibrating motor is energized, K₂Guan Bi, K₂The startup winding connected starts simultaneously at work with running winding, and delay time is set to 3 seconds, and after 3 seconds, vibrating motor has started, and starts winding and disconnects, and vibrating motor enters normal operating conditions; Start winding and substantially increase detent torque, solve the electric motor starting difficult problem caused because of bearing-free reason. Referring to Fig. 4, it is semicircular longitudinal radiating groove 202 that the outer circumference surface of stator 2 iron core has 12 cross sections, forms rational air channel when vibrating motor normal operation, effectively reduces motor temperature rise. Referring to Fig. 5, rotor 3 end ring position is provided with big fin 301. It can be seen from figure 1 that have louvre 501 on end cap 5, the vent 701 being installed on the fan housing 7 outside end cap 5 connects with exhaust system 8.

Referring to Fig. 7, Fig. 8, after vibrating motor is energized, planet non-sliding rolling is done in rotating shaft 4 in tapered raceway 6, and rotating shaft 4 often rolls one week along tapered raceway 6, just makes motor oscillating once, and motor planetary formula frequency of vibration meets formula calculated as below:

$f=\frac{kn}{60}=\left(\frac{r}{R-r}\right)\frac{n}{60}$

Wherein, f is the frequency of vibration during rolling of motor planetary formula, and n is the rotating speed of motor, and R is the tapered raceway two big radius of circle of outer tip end, and r is the rotating shaft two little radius of circle of outer tip end,Speed increasing ratio during for planet rolling.

When vibrating motor runs, rotating shaft 4 is along center of circle O₁With ��₁While rotation, make non-sliding rolling along great circle raceway. Its result is exactly the center of circle O of roundlet₁Center of circle O around great circle₂With ��₂Do reciprocal rotation (revolution), it is achieved thereby that planetary motion. This utility model be the tapering of axle head tapering and the tapered raceway 6 by controlling rotating shaft 4 coordinate the control realized vibrating motor exciting force and amplitude.

If it is desired that the frequency of vibration of vibrating motor is 200Hz, the frequency of external power source is 50Hz, and the rotor speed of vibrating motor is 2860r/min, then now can take speed increasing ratio K=4.2, may further determine that the value of R and r with this. Therefore, planet speed increasing ratio K is a Main Basis of dither motor design, and K takes Tai Gao or the too low vibrating effect directly influencing vibrating motor and reasonability.

This utility model adopts bearing-free structure, as tradition bearing-free motor, do not increase magnetic suspension structure at stationary part, but operated within the specific limits by tapered raceway fixed rotor by force, in order to avoid stator and rotor occur sweeping thorax phenomenon, air gap value relatively conventional motors to increase, and air gap flux density also increases relatively. This utility model has also taken into full account this point in electromagnetism calculates, and except increasing stator winding circle, the excircle of stator core has several semicircular radiating grooves, strengthens fin at rotor end ring position. Due to rotor portion bearing-free, when motor resting state, both sides do not have supporting construction, and rotating shaft two ends are flat on above tapered raceway, bring difficulty thus to the startup of motor, it is necessary to bigger detent torque just can complete normal startup. This utility model is in order to improve the detent torque of vibrating motor, adopt double-winding structure at stator winding sections, add a set of startup winding, start winding and only work in vibrating motor starting process, after startup completes, winding disconnects automatically, and vibrating motor enters properly functioning mode of operation. Louvre is increased at end cap portion, end cap one end installing fan housing, fan housing centre and surrounding open air port, install exhaust system (air exhauster) outside fan housing additional, by external air exhauster, the mechanical friction heat that axle head and tapered raceway produce is extracted out, to avoid causing the too high phenomenon of temperature rise.

Tapered raceway and rotating shaft axle head conical section all require to adopt quenching technology, it is ensured that accessory hardness is up to standard. If hardness is not up to standard, rotating shaft axle head planet rolling in tapered raceway can cause the abrasion of tapered raceway and rotating shaft axle head contact site, affects frequency of vibration and amplitude, not even starting of oscillation.

Operation principle of the present utility model and process are as follows: it is evidenced from the above discussion that, motor population structure divides stator, rotor, end cap, tapered raceway, the several part of ventilation and heat exhaust system, and rotor supports by rotating shaft two ends tapered raceway. When electrical power runs, the startup winding of stationary part and Working winding work simultaneously, motor has bigger detent torque, after having started, starting winding to disconnect, the conical section at rotating shaft two ends will be made non-sliding rolling in tapered raceway and run, now, the existing rotation along axle head center in rotating shaft two ends also has the revolution run along tapered raceway center, and namely this method of operation is defined as planetary motion. This vibrating motor utilizes rotating shaft two ends to do the impact force work that non-sliding rolling produces in tapered raceway. Namely this impact force is the exciting force of vibrating motor, collision frequency and frequency of vibration, and this is different from conventional vibration motor and utilizes the bias at rotating shaft two ends to get rid of block generation exciting force. Of the present utility model one be mainly characterized by by the pyramidal structure of axle head and tapered raceway size coordinate and the special method of operation, it is possible to slowly running of prime mover is changed into dither. Air gap between rotor of the present utility model is bigger, coil turn relatively conventional vibration motor wants many, to reduce air gap flux density, end cap has part louvre, stator core has radiating groove, fin on rotor end ring is relatively big, and additionally all directions on end cap and fan housing have vent and install air exhauster, and main purpose is to prevent the heat that rotating shaft axle head and tapered raceway produce because of Structure deformation from cannot shed.

Claims (3)

1. a bearing-free planetary roller type dither motor, including support, stator, rotor, rotating shaft, front and rear cover;It is characterized in that: described rotating shaft two axial ends bearing-free; The center of described front and rear cover is separately installed with the tapered raceway that inner surface is cone, rotating shaft two axial ends outer surface is the circle of similitude taper matched with tapered raceway angle of taper, rotating shaft two axial ends is placed in tapered raceway, and its mating surface all does high-frequency quenching and processes; Described rotor structure adopts mouse cage type structure; Described stator core is nonstandard structure, and stator core axis hole is relatively big, and rotor diameter is less, and the average airgap between stator and rotor is big compared with the mean gap between tapered raceway and cone rotating shaft axle head; Stator winding adopts double-winding structure, wherein a set of for starting winding; Having several cross sections on the outer circumference surface of described stator core is semicircular longitudinal radiating groove, and described rotor end ring position is provided with big fin; Having louvre on described end cap, the vent being installed on the fan housing outside end cap connects with exhaust system.

2. bearing-free planetary roller type dither motor according to claim 1, it is characterised in that: described rotating shaft two axial ends outer surface and tapered raceway inner surface are its diameters to the cone tapered into outside two.

3. bearing-free planetary roller type dither motor according to claim 1, it is characterized in that: after vibrating motor is energized, planet non-sliding rolling is done in described rotating shaft in tapered raceway, rotating shaft often rolls along tapered raceway one week, just making motor oscillating once, motor planetary formula frequency of vibration meets formula calculated as below:

$f=\frac{kn}{60}=\left(\frac{r}{R-r}\right)\frac{n}{60}$

Wherein, f is the frequency of vibration during rolling of motor planetary formula, and n is the rotating speed of motor, and R is the tapered raceway two big radius of circle of outer tip end, and r is the rotating shaft two little radius of circle of outer tip end,Speed increasing ratio during for planet rolling.